| 摘要 |
PURPOSE:To provide a metal working oil compsn. contg. a lubricating oil component, a specified water-sol. macromolecular compd., an extreme-pressure agent and a surfactant, which is useful in high speed and high-pressure rolling and has circulation stability, etc for easier process control. CONSTITUTION:The metal working oil compsn. contains as essential ingredients (A) a lubricating oil component selected from among oil, fat, mineral oil and fatty acid ester, (B) a water-sol. macromolecular compd. selected from among (a) cationic or amphoteric addition polymer, ring-opened polymer, polycondensate and natural macromolecular deriv. (salt) having an MW of 1,000-10,000,000 and contg. nitrogen atom(s) in the molecule and (b) olefin/maleic acid copolymer, (meth)acrylic acid/maleic acid copolymer salt and (meth)acrylic acid homopolymer having an MW of 250-100,000 or salts of these copolymers, (C) an extreme- pressure agent and (D) a surfactant. The compsn. gives stable and uniform particle size distribution under agitation, has high lubricating performance, undergoes little changes with time and shows minimized incorporation of soiled oil and foreign substances. |
